Printed in U.S.A. 440 04 4801 00 7/3/2014
SERVICE AND TECHNICAL
SUPPORT MANUAL
Two−Stage, Variable Speed ECM Blower Motor
35” Tall, High Efficiency Condensing Gas Furnace
(F/G)9MVE ’A2’ Series
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Safety Labeling and Signal Words
DANGER, WARNING, CAUTION, and NOTE
The signal words DANGER, WARNING,
CAUTION, and NOTE are used to identify levels of
hazard seriousness. The signal word DANGER is
only used on product labels to signify an immediate
hazard. The signal words WARNING, CAUTION,
and NOTE will be used on product labels and
throughout this manual and other manual that may
apply to the product.
DANGER − Immediate hazards which will result in
severe personal injury or death.
WARNING − Hazards or unsafe practices which
could result in severe personal injury or death.
CAUTION − Hazards or unsafe practices which
may result in minor personal injury or product or
property damage.
NOTE − Used to highlight suggestions which will
result in enhanced installation, reliability, or
operation.
!
WARNING
Signal Words in Manuals
The signal word CAUTION is used throughout
this manual in the following manner:
!
CAUTION
Signal Words on Product Labeling
Signal words are used in combination with
colors and/or pictures or product labels.
The signal word WARNING is used throughout
this manual in the following manner:
Safety−alert symbol
When you see this symbol on the unit and in
instructions or manuals, be alert to the
potential for personal injury.
TABLE OF CONTENTS
START−UP, ADJUSTMENT, AND SAFETY CHECK 4...........
SETUP SWITCHES 4......................................
PRIME CONDENSATE TRAP WITH WATER 4.................
PURGE GAS LINES 5......................................
ADJUSTMENTS 5.........................................
ADJUST TEMPERATURE RISE 11............................
ADJUST BLOWER OFF DELAY (HEAT MODE) 12..............
ADJUST COOLING AIRFLOW 12.............................
ADJUST CONTINUOUS FAN AIRFLOW 12....................
ADJUST THERMOSTAT HEAT ANTICIPATOR 14...............
CHECK SAFETY CONTROLS 14.............................
CHECKLIST 14.............................................
COOLING AND HEATING AIR DELIVERY - CFM 15.............
SERVICE AND MAINTENANCE PROCEDURES 17.............
ELECTRICAL CONTROLS AND WIRING 17...................
CLEANING AND/OR REPLACING AIR FILTER 19..............
BLOWER MOTOR AND WHEEL MAINTENANCE 20............
CLEANING BURNERS AND FLAME SENSOR 21...............
SERVICING HOT SURFACE IGNITER 22......................
FLUSHING COLLECTOR BOX AND DRAINAGE SYSTEM 23....
CLEANING CONDENSATE DRAIN AND TRAP 23..............
CLEANING HEAT EXCHANGERS 23..........................
SERVICE LABEL 26.........................................
WIRING DIAGRAM 27.......................................
TROUBLESHOOTING GUIDE − FLOW CHART 28..............
SEQUENCE OF OPERATION 30.............................
PARTS REPLACEMENT INFORMATION GUIDE 35.............
PRODUCT NOMENCLATURE 36.............................
MODELS
(F/G)9MVE0401410A2
(F/G)9MVE0401712A2
(F/G)9MVE0601412A2
(F/G)9MVE0601714A2
(F/G)9MVE0801716A2
(F/G)9MVE0802120A2
(F/G)9MVE1002120A2
(F/G)9MVE1202422A2
Use of the AHRI Certified TM Mark indicates a
manufacturer’s participation in the program.
For verification of certification for individual
products, go to www.ahridirectory.org .
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